Simultaneous modulation and fiber-optic transmission of 10-Gb/s baseband and 60-GHz-band radio signals on a single wavelength

A simultaneous modulation and fiber-optic transmission of a 10-Gb/s baseban d signal and a 60-GHz RF signal with 155-Mb/s differential-phase-shift-keyi ng (DPSK) data on a single wavelength is investigated. To the authors' know ledge, it is experimentally demonstrated for the first. time that both a 10 -Gb/s on-off-keying baseband signal and a 60-GHz RF signal with 155-Mb/s DP SK data are simultaneously modulated with a single optical modulator and tr ansmitted over 40-km-long dispersion-shifted fiber (DSF). There exists the received optical power capable of achieving a bit error rate of 10(-9) simu ltaneously for both the RF and baseband signals. The degradations due to th e nonlinearity of the electroabsorption modulator for the baseband and RF s ignals are also investigated theoretically and clarified numerically.